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02 Seville, 04 SRX
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Discussion Starter #1
I am debating on getting the head gasket job done. I have had intermittent P0741 without P1860. Does this mean that the whole torque converter needs to get replaced? If so, how much is the part usually? I would have this done when the cradle is out of the car.
 

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2001 Seville STS, 1990 Seville (RIP), 1972 Sedan Deville
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26,323 Posts
Could be the TC, or seals inside the transmission. No way to tell, so they both need to be done together.
 

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White Diamond '03 DHS (with DTS floor shift)
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02 Seville, 04 SRX
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Discussion Starter #4
Ranger, you wouldn't know off the top of your head the approximate cost of the solenoid would you? Rockauto has a Control Solenoid for under $30, can it be that cheap?
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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68,458 Posts
The solenoid was about $65 GM retail. The GM shop labor to replace the solenoid only is 10 hours.

To replace the converter, seals, and solenoid is about 14 hours, not including parts.
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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19,270 Posts
Ranger, you wouldn't know off the top of your head the approximate cost of the solenoid would you? Rockauto has a Control Solenoid for under $30, can it be that cheap?
================================
with the trans sitting on the ground -
figure around $1200 to $1500 to tear it down -
replace the seal and torque converter -
 

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02 Seville, 04 SRX
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Discussion Starter #8
Basscatt, you are saying that $1200 to $1500 would be the whole job? The engine and transmission will already be out of the car to address the head gaskets, I was thinking that the transmission portion would be very small (price wise) since everything is out of the car.
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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19,270 Posts
Basscatt, you are saying that $1200 to $1500 would be the whole job? The engine and transmission will already be out of the car to address the head gaskets, I was thinking that the transmission portion would be very small (price wise) since everything is out of the car.
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Basscatt, you are saying that $1200 to $1500 would be the whole job?
no -
that would be the cost to repair the trans -
and includes a new torque converter -

it does NOT include removing the trans from the car -
nor re-installing the trans -
 

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White Diamond '03 DHS (with DTS floor shift)
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Ranger, you wouldn't know off the top of your head the approximate cost of the solenoid would you? Rockauto has a Control Solenoid for under $30, can it be that cheap?
Yeah, we call it the $20 part, buried $2000 deep in the trans.
 

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Too many...
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What is the seal in question? And how could it be thousands in labor to get to a part on a transmission already loose? That doesn't add up. A loose transmission can be fully rebuilt in well under 10 hours. You guys throw out absurd numbers sometimes.
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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19,270 Posts
What is the seal in question? And how could it be thousands in labor to get to a part on a transmission already loose? That doesn't add up. A loose transmission can be fully rebuilt in well under 10 hours. You guys throw out absurd numbers sometimes.
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You guys throw out absurd numbers sometimes

do a little more research - and post YOUR findings -
please include company names and contact information -
willing to replace the seal and torque converter in question -
 

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White Diamond '03 DHS (with DTS floor shift)
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The thousand dollar numbers are for when the drivetrain must be dropped.
I have no clue what it would cost if the trans is already out, but I doubt it would be anywhere near that, but like Bass said, get some estimates.
 

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02 Seville, 04 SRX
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Discussion Starter #14
What parts need to be replaced specifically? Is it just the seal or does the Transmission Control Solenoid get replaced along with it?
 

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White Diamond '03 DHS (with DTS floor shift)
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The seal needs to be replaced. GM recommends replacing the TC as well and while it's down, can't hurt to replace the solenoid.

If you read the link in post #3 you should have noticed this.

Replace the Torque Converter when servicing a vehicle with this condition.
The Viscous Coupler has an extremely high failure rate when it is allowed to slip out of spec.
 

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02 Seville, 04 SRX
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Discussion Starter #16
I get it. Needs a new torque converter. I'm reading through all the threads where people have P0741 and just live with it. Since we know it is the torque converter, can I just live with it or does it mean that I will soon see complete transmission failure? Also, going 50 and then tapping the brake the RPMs don't ever increase. I don't know if this information is relevant or not.
 

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'96 STS
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Had the solenoid replaced in my 1996 STS several years ago at a Cadillac dealership in Victoria BC. Meant pulling the engine/trans, repair and re-install...$3000.00 ! Trouble free and 70.000 miles later. Still think it was worth it.....love the car !
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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19,270 Posts
I get it. Needs a new torque converter. I'm reading through all the threads where people have P0741 and just live with it. Since we know it is the torque converter, can I just live with it or does it mean that I will soon see complete transmission failure? Also, going 50 and then tapping the brake the RPMs don't ever increase. I don't know if this information is relevant or not.
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I get it. Needs a new torque converter.
IF you are replacing the seal -
GM recommends replacing the torque converter at the same time -


P0741 - by itself - means there is a worn seal - deep in the trans -
that is preventing the torque converter clutch from going into LOCK-UP -

I'm reading through all the threads
where people have P0741 and just live with it.

correct -

the ONLY problems with this condition is that you will -
1) automatically fail an emissions test -
2) loose 2 or 3 mpg at highway speeds -

can I just live with it
YES -
if you are not subjected to emissions testing/inspections -
and you don't care about a couple MPG's at highway speeds -

does it mean that I will soon see complete transmission failure
NO -
the condition will not adversely affect the longevity of the trans - at all -
as you noted above - MANY choose to "live" with the condition - for years - forever -

Also, going 50 and then tapping the brake the RPMs don't ever increase
correct - because your converter doesn't go into LOCK-UP -
if the converter was going into LOCK-UP -
tapping the brake takes it out of lock-up -
and the rpm would increase by 200 to 300 rpm -

this may help explain things -

imagine two electric fans - facing each other -

one fan is plugged into the electrical socket - and turned on -
this represents the engine-driven half of the torque converter -

the second fan WILL be turned by the airflow of the first fan -

the second "fan" within the torque converter -
is driven by trans fluid - instead of air -
and turns the transmission -

the second fan will not spin as fast as the first fan -
there is a slight loss of power -
EXACTLY what happens with the torque converter in the trans -

now imagine a couple sticks - sticking through the fan blades -
now - BOTH fans must spin at the same speed -
because they are LOCKED-UP - forced to spin at the same speed -

this is the theory of how LOCK-UP works -

================================================

Had the solenoid replaced in my 1996 STS several years ago at a Cadillac dealership in Victoria BC. Meant pulling the engine/trans, repair and re-install...$3000.00 ! Trouble free and 70.000 miles later. Still think it was worth it.....love the car !
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the lock-up solenoid is replaceable without pulling the trans -
 

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Administrator
2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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the lock-up solenoid is replaceable without pulling the trans -
............ with about 8 hours of backbreaking disassembly, microsurgery, reassembly - through a 1" wide space provided by removing everything on the rear (driver's) end of the engine and transmission and loosening the transmission side cover.

Videos in Cadillac Tech Tips.
 

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Super Moderator
White Diamond '03 DHS (with DTS floor shift)
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86,783 Posts
I have and have had the P0741 code for years now. Constantly clearing the code is a PITA, but other than that (and a mile or two loss in MPG) I don't even notice it and do not expect any trans problems.

P.S.
Obviously, I'm not subjected to emissions testing.
 
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